Lagg Lake 2 Reservoir Report
Nearby: Lagg Lake 1 Dam Miller Lake Dam
Last Updated: December 6, 2025
Located in Jefferson County, Illinois, Lagg Lake 2 is a privately owned recreation dam completed in 1976.
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Summary
This Earth-type dam stands at a height of 32 feet and has a length of 825 feet, providing a storage capacity of 799 acre-feet of water. The primary purpose of the dam is for recreation, with a normal storage capacity of 561 acre-feet.
Managed by the Illinois Department of Natural Resources, Lagg Lake 2 is regulated and inspected by the state to ensure its safety and compliance with regulations. Despite being classified as having a low hazard potential, the risk assessment indicates a moderate risk level. The emergency action plan status and condition assessment are not available, suggesting a need for further evaluation and preparation in case of emergencies.
Surrounded by the scenic beauty of Idlewood and fed by the Trib Casey Fork stream, Lagg Lake 2 offers a tranquil setting for water resource and climate enthusiasts to explore and enjoy recreational activities. With its moderate risk level and state regulation, the lake presents an opportunity for both relaxation and a reminder of the importance of proper dam management and safety protocols in the face of changing climate conditions.
Year Completed |
1976 |
Dam Length |
825 |
Dam Height |
32 |
River Or Stream |
TRIB CASEY FORK |
Primary Dam Type |
Earth |
Nid Storage |
799 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Lagg Lake 2